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http://dx.doi.org/10.5515/KJKIEES.2012.23.11.1315

Accuracy Improvement of Time Domain Impedance Measurement Using Error Calibration Method  

Roh, Hyun-Seung (College of Information and Communication Engineering, Sungkyunkwan University)
Cui, Chenglin (College of Information and Communication Engineering, Sungkyunkwan University)
Kim, Yang-Seok (KHNP Central Research Institute)
Chae, Jang-Bum (College of Engineering, Ajou University)
Kim, Byung-Sung (College of Information and Communication Engineering, Sungkyunkwan University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.23, no.11, 2012 , pp. 1315-1322 More about this Journal
Abstract
Frequency domain reflectometry diagnoses faults on electric cables by measuring the cable impedance. Time domain impedance measurement technique using an oscilloscope instead of a network analyzer is widely used for electric power cables under harsh environment or powered condition. However, impedance measurement in the time domain shows inaccuracy as the frequency increases due to several parasitic impedances, which results in the poor resolution of fault points. This paper presents the accuracy enhancement technique using a module with an operational amplifier and an error calibration method in the time domain impedance measurements, which is confirmed by comparing the cable impedance measurement results.
Keywords
Frequency Domain Refectometry; Operational Amplifier; Calibration; Cable Impedance; Time Domain;
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